Electrical signaling and switching apparatus.



No. 878,465. PATENTED FEB. 4, 1908. R. H. MANSON. ELECTRICAL SIGNALING AND SWITCHING APPARATUS.

APPLIOATION FILED MAY 29, 1907 UNITED STA'IT'ES- PATENT OFFICE. j

RAY H MANSON. OF ELYRIA, OHIO, ASSIGNOR TO THE DEAN ELECTRIC COMPANY, OF ELYRIA,

OHIO, A CORPORATION OI OHIO. I

ELECTRICAL SIGNALING AND SWITC ING APPARATUS.

Specification of Letters Patent.

Patented Feb. 4, 1908.

prig-inal application filed September 10- 1906. Serial No.334\008. Divided ainltliis application filed May 29.1907. Serial No. 376.423.

To all whom it may concern:

Be it known that I, RAY II. hIANSON, a citizen of the United States, residing at Elyria, in the county of Lorain and State of Ohio, have invented certain new and useful Improvements in Electrical Signaling and Switching Apparatus, of which the following is a specification, reference being had therein to the accompanying drawing.

My inventionrelates to spring jacks for telephone switchboards and has for its object the improvement of such apparatus in oer-- tain particulars which will hereinafter appear.

The present applicatio/n is a division of my prior application, Serial No. 334,008, filed September 10, 1906, in which I have illustrated, described and in part claimed a, complete assemblage consisting of a cone,

bined annunciator drop and spring jack in 1 which the insertion of a plug in a jack acts to cut out the magnet of the drop and at the same time mechanically restores the shutter. My present type of spring ack is particularly adapted for use in such a combination structure, but is not limited thereto.

Briefly stated, the present invention comprises a front platefa pair of side frames connected by a front yoke, contact springs supported between the side frames, and a tliimble passing through the front plate and securing the yoke thereto. The jack is thusmade and assembled as a unit without regard to the rest of the structure, and may be readily detached therefrom. In order to permit of asy inspection, I make openings in my side plat through which the spring contacts may beinspected and adjuster The novel features of my invention willbe specifically. pointed out in the following d. tailed description and in the claims appended thereto.

The invention is illustrated in the aeci'iz.i panying drawings whereinv Figure 1 is a vertical longitudinal section through a combined drop and jack structure in part embodying the present invention. Fig. 2 is abottom plan view showing the jack when removed from the rest of the structure.

Pi 3 is a rear end elevation of Fig. 1.

having a core c and winding C, with the armature b carrying the detent rod b whose block 1) is pivoted at b and held by a spring I), with an overlying saddle 11; also the drop shutter D having an opening d receiving the end 6 of the armature lever andpivoted at (Z on the plate (Z. This shutter is adapted The tip j extends through an opening 6'' in the housing and when the spring is raised it engages the cam surface d" on the shutter.

Below the housing E lies the jack J, the

working parts of which are supported in a frame composed of two longitudlnal side strips J, J'-, joined at their front ends by a yoke piece j and at their rear ends l) a horizoni'a yoke-plate j upon which and between the side plates are mounted the various operating springs. The jack frame is secured to the front plate A by the hushed thimble j, the insulating plate a" extending down between theframe and the front plate and being pierced for the passage of the thimble shank, while the latter is surrounded by the insulating bushing j, whereby the jack framiand connecting parts are entirely insulated from the front plate. This is desirable for several reasons one. being the prevention of possible crosses or short-circuits between or on the different lines whose units are carried on the same plate, or whose plates are secured on the same metal switchboard frame. This is particularly necessary, also, because one of the night alarm contacts is grounded on the I frame, the other being insulated in each case.-

The jack springs are four in number, coinprising the two contact springs j and j the anvil spring j" upon which the spring j normally rests, and the restoring spring f. whose forward end j" extends out through the opening a in the front plate, intotho box or housing E and is there turned up as shown in Fig. 1', lying below the end of the tongue 11 on the drop shutter. Intermediate of its endstliespringj rests upon an insulaiingstud j which is preferablr shouldered and has its neck lying in an opening in the spring to prevent lateral displaceimnt. The spring in the idle condition of the apparatus lies upon a bridge piece or stud J. extending from side to side of the jack frame and comprising an outer insulating sleeve and an inner metal stud having its ends riveted into the two frame plates. This stud also receives on its under face the thrust of the anvil spring 1',

with which the-tip spring j" makes strong of the contact. spring 1 contact while idle. The adjustment of the parts is such that they will lie in the-position shown in Fig. 1 when the apparatus is in disuse, and a careful examination of this figure will show that with my arrangement it is possible to secure both easy assembling and perfect adjustment of the jack before the latter is applied to the front plate at all. When the complete apparatus is finally assembled all-together, the steady-pins y' lie in corresponding openings in the rear face of the insulated plate a the jack structure being thus prevented from turning, which it might do if secured by the thimble 7' only, since this latter is tapped into the yoke j and unless riveted might in practice slacken up enough to permit the jack to have some slight play, thereby spoiling the adjustment of the springs and particularly the restoring spring.

The jack springs are secured at their rear ends by being piled. up with'interposed slips of insulating material upon the cross-yoke and held in such position by the lamping platej and the screws j the 1.41161 being pushed if required and topped directly into the yoke-plate." In order to permit .of in-' spection and adjustment after assembling the jack-springs, I cut out the side plates J andv J to form openings O, as shown in Fig. 1.

In order to make electrical connection between the coil and the j ack-terminals, I provide the solid pivoted hasps H, H secured at their lower ends to th proper terminals on the jack frame, and at their upper ends engaging the terminals 21?, c secured to the ead of the spool. on a screw it tapped into the sleeve 3" formed upon the rear end of the anvil spring j"; While the hasp H is pivoted on the spool h tapped into the sleeve j formed up on the rear end The contact spring y" also has a sleevej, which takes a screw h but there is no hasp connection, the only.-:

purpose iii this case being to provide a solid terminal for attachment of the circuit wires. For this purpose I secure by,means of the screw 7L2 a tailed Washer h, having its outer end perforated for the attachment by solder of the line-wire. The other side of the line is,

attached to a similar perforated tail formed on the has H. It will thus be observed that when t e hasps H and H are turned up to engage the two terminals 0 c and the screws 0 are tightened upon them, that the magnet winding is bridged across the two springs, 1' 9'", and as the latter is normally 1n contact with the spring 1" and as the springs 7' and j are the line terminals, it follows that Th hasp H is pivoted the magnet is normally bridged across the line and is cut out when the plug is inserted. The operation of my improved combination apparatus is as follows: The parts all being in the position shown in Fig. 1, when signaling current comes over the subscribers line it passes in by way of the terminal h and hasp H, through the coil C, back through hasp H to the spring 9', thence to the spring j, and back to line by way of the terminal h. The armature b beingattracted, the rod 1) is lifted, the hook detached from the shutter, and the latter falls. When the plug is inserted in response to the call it spreads apart the springs j and 7' the former 'liftin off the contact 1' and thereby cutting it understood that I include .all such within" the scope and purview thereof.

-Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l. A spring jack comprising a front sup- I porting plate, a pair of side frames cross- ,2. A spring jack comprising side plates connected by transverse bridges or yokes, contact springs mounted upon one of the bridges and lying between the side plates,

one of said side plates being provided with a sight opening opposite to and permitting inspection of the contacts, substantially as described.

RAY H. MANSON. Witnesses:

S. J. ROBERTS, W. C. S'rRoNo. 

